bov has nothing to do with the wastegate....the answer is yes.
the difference is that internal takes the extra exhuast fumes into another pip that sually connects to the exhaust, extrenals is like....free <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>